Fabric shifting and tensioning mechanism for embroidering-machines.



J.A. GROEBLI.

FABRIC SHIFTING AND IENSIONING MECHANISM FOR EMBROIDERING MACHINES.

APPUCATH'JN FILED JAN-10, 19M.

1,210,793. Patented Jan. 2,1917.

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FABRIC SHIFTlNG AND TENSIONING MECHANISM FOR EMBROIDERING MACHINES.

APPLICATION HLED JAN- 10, 19H.

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FABRIC SHIFTING AND TENSIONING MECHANISM FOR EMBROIDEBIN-G MACHiNES.

APPLICATION FILED JAN. 10. I914.

1,216,793. Patented Jan. 2, 1917.

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FABRIC SHIFTING AND TENSIONING MECHANISM FOREMBROIDERING MACHINES. APPucATwN FILED JAN. 10. 1914.

1,210,793. Patented Jan. 2,1917.

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J. A. GROEBLI.

FABRIC SHIFTING AND TENSIONING MECHANISM FOR EMBROIDERING MACHINES.

APPLlCATlON HLED JAN. 10. 1914.

1,210,793. Patented Jan. 2, 1917.

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J. A. GROEBLI.

FABRIC SHIFTING AND TENSIONING MECHANISM FOR EMBROIDERING MACHINES.

APPLICATION FILED JAN. 10. 1914.

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J. A. GROEBLI.

FABRIC SHIFTING AND TENSIONING MECHANISM F ORYEMBROIDE-RI NG MACHINES.

APPLICATION FILED JAN. 10. 1914.

1,210,793. Patented Jan. 2, 1917.

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J. A. GROEBLI.

FABRIC SHIFTING AND TENSIONING MECHANISM FOR EMBROIDERING MACHINES.

APPLICATlON FILED JAN. 10. 19M.

1,210,793. Patented Jan. 2,1917.

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APPLICATION FILED JAN. 10, 1914. v N 1,210,793, Patented Jan. 2,1914.

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FABRIC snmms AND nswsmmmc MECHANISM FOR emsaommme MACHINES APPLICATION FILED IAN,IO,19I4. v

Patented Jan. 2,1917.

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FABRIC SHIFTING AND TENSIONING MECHANISM FOR EMBROIDERING MACHINES.

APPLICATION HLED JAN. 10, I914.

1,210,793. Patented Jan. 2,1917.

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J. A. GROEBLI.

FABRIC SHIFTING AND TENSIONING MECHANISM FOR EMBROIDERING MACHINES.

APPLICATION FILED JAN. 10, 1914.

1 ,2 I 0,793 Patented Jan. 2, 1917.

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J. A. GROEBLI.

FABRIC SHIFTING AND TENSIONING MECHANISM FOR EMBROIDERING MACHINES. APPLICATION FILED JAN. I0. I914.

1,210,?93. I I Patented Jan. 2,1917.

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I I gveniioz x JOSEPH A. GROEBLI, OF NEW YORK, N. Y.

FABRIC SHIFTING AND TENSIONING MECHANISM FOR EMBROIDERING-MACHINES.

Specification of Letters Patent.

Fatented Jan. 2, 191?.

Application filed January 10, 1914. Serial No. 811,289.

To all whom it may concern Be it known that I, Josnrrr A. GROEBLI, a citizen of the United States, and a resident of the city, count, and State of New York, have invented certain new and useful Fabric Shifting and Tensioning Mechanisms for Embroidering-llachines, of which the following is a specification.

The present invention relates to embroidering machines of the large type wherein a movable tambour frame carrying one or more sheets of fabric is moved in various directions and extents in a plane, so that the many needles, which move in unchanging paths, will pierce the fabrics at different positions and thus produce stitches upon the fabric.

In such machines it is customary to arrange fabric supports or rollers, generally in pairs, upon the tambour frame in such manner as to hold the sheet of fabric intermediate the rollers of each pair in a vertical plane, to be stitched by the needles; and it is also customary to provide these rollers with a supply of fabric, sufficient to enable a large number of rapport rows of stitches or designs to be worked upon each piece of fabric. As the fabrics are usually stretched between the rollers in large sheets, or fields, sometimes as long as thirty feet, and several feet in height, the fabrics must be tensioned, both in a vertical and horizontal direction, and be held taut and smooth during the stitching operations, in order to obtain a uniform and accurate product. The rollers are practically limited in their weight, and therefore their rigidity, because of the mobility of the tambour frame; and, because of their great length, they tend to sag or become distorted between their ends, especially when the fabrics between them are under tension. It is therefore necessary to support these rollers between their ends during the stitching operations; This is usually accomplished by providing intermediate supports or brackets, which must be movable in relation to the rollers, because they must be released from engagement therewith to permit of freedom in the shifting of the fabric.

The side tension devices, which place a horizontal or lateral stress upon the fabric, must hold the fabric smooth andtaut; but, in order to permit the fabrics to be shifted,

they must be more or less released or disengaged therefrom.

The fabrics are usually shifted, to bring new or embroidered portions in line with the stitching devices, by turning the fabric rollers to shift the fabric from one roller of each pair to the other; and the longitudinal and vertical stresses are generally taken off the fabrics to permit of this shifting, and are afterward applied again.

The various operations necessary to shift the fabrics and tension them, such as releasing the brackets, releasing the vertical tension, releasing the side tension devices, operating the rollers to shift the fabric, tightening vertical tension, and tightening the side tension devices, have heretofore been performed by manual labor, which made the results irregular and uncertain; and besides this, the operations required considerable time. Several of these operations must be performed in definite relative order or sequence.

The purpose of the present invention is to provide means for automatically carrying out, in proper sequence, the several operations necessary for shifting and tensioning the fabrics.

One of the important objects of the present invention is to provide mechanism whereby the completion of the operation of one of the fabric affecting devices will automatically initiate the operation of one or more of the devices which must succeed it in propersequence of operation. By making the mechanism so that the completion of one function will automatically initiate another and necessarily succeeding function, it is possible to allow a sufficient period of time for the completion of each function, and to still perform all of the functions within a minimum period of time. Another result thereof is that one or more of the individual fabric-actuating devices may be adjusted to cause greater or lesser movements, according to differing requirements, and still retain proper sequence in the operations of the several devices, and without unnecessarily extending the period of the complete set of operations. Let it be assumed that, starting with the fabric in the condition following the formation of a row of embroidery, the fabric is to be loosened, shifted and again tensioned, and

let it be assumed that in the complete op eration there are five separate steps as, 1st, releasing the side tension; 2nd, releasing the vertical tension; 3rd, shifting the fabric; 4th, applying the vertical tension; and 5th, applying the lateral tension. These several steps must not only operate in a certain sequence but some one or more may have to be varied in extent or period of time in order to create different tensions for different kinds of fabrics, or to shift the fabrics to different extents. One method of allowing for these changes would be to allow a maximum period for each step of the operation, Within the limits of which one or more of the several independent devices may be varied; but in that case the complete operation would be unnecessarily lengthened, as there would at times be periocls when one or more of the several fabric actuating devices would remain idle. In the present machine, however, the extent or period of time of operation of one or more of the fabric actuating devices'may be individually extended or shortened, as conditions may demand; but the entire cycle of operation will take place in the shortest time 2'. 6., the actual operating time consumed by the several devices, so that there need be no periods of inactivity. In addi- I tion, the present machine makes it practically impossible for one device to operate until the operation of the devices which must precede it has taken place, even though the extents or periods of time of operation of the several fabric affecting devices are varied or adjusted.

Another object of the present invention is to reduce the number of different mechanical movements necessary for operating the several fabric devices and to this end all the operations are initiated from a common source, preferably a cam. This not only reduces the number of mechanical movements, but it also insures proper sequence, and permits of their being reduced to a minimum period of time in any set of conditions.

In addition to the above, the present invention includes features relating to the different fabric controlling devices. In some branches of the machine it is desirable to operate a tensioning device in a positive tinue the operation in a positive manner a given and adjustable extent. The present machine is adapted to meet all of these requirements, so that the various operations may all be performed in the most successful manner.

In addition to the above, the present invention embodies novel means for automatically controlling the extent of fabric shifted during the reeling operation. Where the fabric is wound upon a support, as upon a roller, the diameter thereof increases or decreases as the fabric is wound on or off the same; and, therefore exactness cannot be fully obtained bymeasuring'the fabricshifting operation by the number of revolutions of such a roller. In the present machine the shifting of the fabric is controlled according to the distance the fabric is moved, regardless of any change in the size of the roll of fabric on the roller. I am thereby able to regulate more accurately the automatic shifting of the fabric.

Under the present invention, much of the heavier mechanism may be, and preferably is, located on a stationary support, so that the tambour frame need not be burdened therewith.

Hereinafter I will describe in detail the best known embodiment of my invention; but it is possible to embody the essence of the invention in other forms and arrangements, within the scope of the annexed claims.

Still other features than those above enumerated will be set forth in the detailed description and in the claims. And it will be understood that some branches of the present machine may be segregated and used separately to perform their peculiar functions.

In the drawings forming part of this application, Figure 1 is a front elevation of an embroidering machine embodying my invention, wherein the various stitching devices are omitted to simplify the drawing, Fig. 2 is a plan view of the mechanism to whichmy present invention more particularly relates, Fig. 3 is a sectional view, taken on the line 3-3 of Fig. 4, looking upward and showing the several clutches and their controlling levers; Fig. 4 is a plan view of the several clutches, gears, switches and associated parts, with a part broken away to show, in section, the details of a clutch; Fig. 5 is a diagrammatic view of the electrical wiring; Fig. 6 is a sectional view showing the various. parts associated with the dial by which the extent of the fabric shifting operation is controlled; Fig. 7 is a similar view, but showing the parts in a different position; Fig. 8 is a plan view thereof; Fig. 9 is an elevation of the arm which is set at different positions on the dialto arrest the shifting operation; Fig. 10 is an edge view thereof; Fig. 10 is a plan ice view of a lever associated with the shifting device; Fig. 11 is an elevation showing part of the transmission employed in the fabricshifting control device, Fig. 12 is a sectionalv tension device, reeling mechanism, and the meanssfor connecting these various devices with their operating mechanisms, Fig. 14L is an elevation of the devices for advancing the electrical connection and the switches for throwing the automatic mechanism into and out of operation, and is substantially a view looking upwardly at the device shown in the right half of Fig. 4; Fig. 15 is an elevation showing the devices for advancing the operating cam step by step; and it is an end view looking at the right hand end of Fig. 4; Fig. 16 is an elevation of the operating cam and the several levers directly associated therewith, taken from the opposite side to that shown in Fig.8, Fig. 17 is an elevation of the ratchet by which the cam shaft is intermittently revolved; Fig. 18 is a plan view of the disk for advancing the electrical contacts to insure the proper sequence in the different operations; Figs. 19 and 20 are elevations of different pawls; Figs. 21 and 22 are an elevation and a plan view, respectively, of the device for terminating the operation of the side tension devices and for initiating the operation of another fabric affecting device; Fig. 23 is a detail view of a portion thereof the switchoperating cam being omitted, Figs. 24: and 25 are an elevation and a plan respectively, of the device for terminating the operation of the bracket device and for initiating the operation of a succeeding device, Figs. 26, 27 and 28 are detail views of portions thereof; Fig. 29 is a sectional view, showing the operation of the side tension device; Fig. 30 is a sectional view showing'the connect-ion of the roller which measures the fabric shifted and which controls the extent of the shifting operation, Fig. 31 isa hori- Zontal sectional view of the flanged wheel and swinging latch shown at the right in Fig. 25 Fig. 32, is a rear elevation of the tambour frame showing the connections for the feed, lateral tension, vertical tension and measuring devices in their proper relations, Fig. 38, shows in plan the connections of the various elements for advancing the operating cam step by step, Fig. 34 is a plan-view of the friction disk and connections for opening and closing the side tension devices, Fig. 35, is a plan view of one of the levers for controlling the clutches, Fig. 36, :is a cross sectional view of the same, showing the hub of the clutch in position between the lugs on the arm, Fig. 87 is a diagrammatic elevation showing the connections between the hand lever and the governing cam and their respective clutches for controlling the fabric rollers, Fig. 38 is a plan view of the same, Fig. 39 isa diagrammatic elevation of the connections between the governing cam and the clutches for controlling the side tension devices, Fig. 40 is a plan view of the same, Fig. 41 is a diagrammatic elevation of the connections between the governing cam and the vertical tension devices, Fig. 42 isa plan view of the same, Fig. 13 is a diagrammaticelevation, partlyin section, of the governing cam and the switch controlling lever, Fig. 44; is a plan view of the same showing also. the switches. Fig. 45 is a detail plan view of the parts for throwing the bracket device out of operation. Fig. 16 is a sectional view showing similar parts, but with some of the parts in different positions to that shown in Fig. 15, and Fig. 47 is a detail view of one of the hand levers.

As previously stated, I prefer to employ the present mechanism, in a machine embodying fabric shifting means, side tension and vertical tension devices.

In Fig. 13 I have shown one end of the tambour frame and connections of an embroiderin-g machine for the purpose of illustrating the manner of connecting the operating and controlling parts with the above mentioned devices; and in Fig. 1 I have shown a general view of the frame, the tam bour frame and connections of an embroidering machine.

In Fig. 1, there is shown the stationary frame 1, of a conventional embroidering machine, upon which the tambour frame 2 is supported by means of aparallel motion and counter-balancing device 8, of ordinary construction, whereby the tambour frame may be moved in various directions in its vertical plane. An ordinary panto-graph device is represented at 4i, the purpose of which'is to permit the operator to move the tambour frame in different directions according to a design held upon the pattern board 5. All of these parts may be of usual construction; and, if preferred, the tambour frame may be controlled by means of a jacquard or automat, in so far as my present invention is concerned.

The present mechanisms for controlling and operating the various fabric devices may be'mounted upon either the stationary frame or the tambour frame, but, in order to relieve the latter of as much of the weight as possible, I prefer to mount such mechanisms upon the stationary frame and transmit the operations to the devices on the tambour frame by means of flexible and telescoping means. lhe mechanisms here referred to are shown supported upon a bed or shelf 6 which is supported upon the stationary frame by means of brackets 7 and is located behind the pattern board 5.

The shaft'S operates the side tension devices, the shaft 9 the vertical tension devices, and the shaft 10 the fabric rollers. And I will hereinafter explain means which may be used for those purposes, although those means are not part of the invention claimed in this present application.

The shafts 8, 9, 10,are operatively connected, with their actuating and controlling mechanism, by means of the several shafts 20, 21, 22, through the universal connections 23 which permit free movement of'the tambour frame in relation to the parts which are mounted upon the stationary frame, the several shafts 20, 21 and 22 being each composed of sections which telescope at 24 (see Fig. 2).

Upon the bed 6 is supported a lateral shaft 25 on'which are mounted the several gears by which the shafts 8, 9, 10 may be turned in either direction. The power for operating the complete mechanism is preferably applied directly to the shaft '25, as by means of an electric motor 26 operating through the gears 27 and 28; and from this shaft 25 preferably all, or nearly all, of the several mechanical movements are distributed.

The shaft 25 hasa pair of miter gears 29, 30 loose thereon, both of which continually mesh with a miter gear 31. The latter is secured to a short shaft 32 (see Figs. 2 and 4) mounted in a bearing upon the bed; and this latter shaft is in turn operatively connected by ;means of a knuckle joint 33 with the shaft 22. These gears 29, 30, being always in mesh with the gear 31, it is only necessary to cause either one or the other of their gears 29, 30 to turn'with their shaft 25 in order to revolve the shaft 22 one way or the other; and as there is no intermediate position or adjustment necessary to permit shifting the gears it is only necessary to throw one or the other of the gears 29, 30 into operation. By employing connections of this character I reduce the movements to a minimum and make it possible to initiate the operation of one fabric affecting device by the completion of the operation of a preceding one.

There is a friction clutch 34 keyed to the shaft 25 as by a spline, and therefore revolving with it, in such a way that it can slide axially on it; and it is arranged to clutch the gear member 29 to cause the latter to revolve, and thereby turn, the shaft 22 and the fabric roller. The clutch 34 is drawn out of engagement with the gear 29 by means of a spring 35 which draws the link 36. The latter, which is operated by means to be hereinafter described, acts upon the lever 37, which has a pair of lugs or fingers 37 engaging on opposite sides of the hub 40 of the clutch member 34, and serves to move the clutch member toward the gear member 29. In this manner th clutch is thrown outby spring pressure and thrown in by other means.

The engagement of the levers 44, 56, 61, 72 and 75 with their respective hubs is in each case similar tothat of the lever 37 and the hub 40.

A similar clutch 41, but oppositely positioned, is shown slidably keyed to the shaft 25. This clutch acts upon the gear 30, and serves to throw the latter into operative relation with the shaft 25 and thereby cause the revolution of the shaft 32 in a direction reverse to that caused by the gear 29. The clutch 41 is moved into operative engagement with the gear 30 by means of a spring 42, acting upon the lever 44 which is ful-' crumed to the bed at 45; and this leverengages the hub of the clutch member-'41. Through these parts the clutch 41 is thrown in by spring action and released by positive means through the link 43. The clutches 34 and 41 however, cannot both be thrown in at the same time, as will appear from the further description of their. operating means hereinafter contained. The clutches 34,. 41, and others to be referred to, may be of ordinary construction. The form herein shown has a frusto-conical friction part 46, formed of laminated raw hide, arranged to engage a conical recess 47 in the gear member.

Theabove constitutes the means for turning the fabric rollers in one direction, from the shaft 25, for the purpose of shifting the fabrics to bring new or unembroidered portions'before the rows of needles.

Loosely mounted upon the shaft 25 there are oppositely arranged miter gears 48, 49, similar to the gears 29, 30. They both mesh at all times with aigear 50 which is fast upon a shaft 51 mounted in a bearing upon the bed. The shaft 51 is connected by interven-v ing mechanism, including a knuckle joint 53 and a shaft 52, with the shaft 20 which operates the side-tension-device shaft 8.

The clutch 54, which is similar to the clutch 34, is moved into engagement with the gear member 48 by means of a spring 55 connected at one end with'a lever 56 and at its other end with a lever 61. The lever 56, which is operated through a link 57 is fulcrumed to the bed at 58; and ithas an arm engaging the grooved hub of the clutch member 54, similar to the connection of the lever 37 with its clutch.

There is another clutch member 59 which is arranged to engage the gear member 49; and it is caused to engage the gear member by means of the spring 55 acting on the lever 61. This lever, 61, is operated through a link 62; and it is fulcrumed to the base at 63 and has an arm engaging the grooved hub of the clutch member 59, similar to the connection of the lever 37 with its clutch.

Whenever the clutch 59 is thrown in to en gage its gear 49, the shaft 51, and through be thrown in at the same time as that might cause breakage.

Thereis still another set of clutches and gears for operating the third shaft, 9. 'The miter gears 64: and 65 loosely mounted on the shaft 25, both 'mesh with the gear 66. I

The latter is fast upon the shaft 67,. which is mounted in a bearing upon the base and is connected, through intermediate mechanism, including a knuckle joint 69 and short shaft 68, with the shaft 21 which operates I the vertical tensioning or truing devices. a

Thecluteh 70, rotating with the shaft 25, is arranged to engage the gear member 6 to cause the latter to revolve with theshaft 25.

This clutch" is thrown in by means of a spring 71 fastened at one end to and acting on the lever 72, and fastened at its other end to the lever? 5; and is thrown out by positivemeans. The lever 72 is fulcrumedto the base at 73 and it has an arm-engagingthe grooved hub of the clutchTO.

7 Another clutch 7 4E, rotating with the shaft" 25, is arranged to engage the gear member 65 to cause the latter to turn with its shaft.

This clutch is thrown'inby means of the' 7 spring 71-acting on the lever 7 5; and it is thrown outby positive'means, as in the cases of the previously described clutches. The lever 7 5 is fulcrumed to the bed at -76; and it has an arm'engaging the grooved hub of i the clutch'member'lh It is operated through link 77, as will be apparent from the subsequent description.

Through-either the clutch or 74, acting on their respective gear members, the motion of the shaft 25 may be transmitted to the shaft 21, to operate the latter in one or the other direction.

From the above description it will be apparent that all three shafts 8, 9, 10 are operated from the same shaft '25; z. e. the shaft 8 through shaft 20, telescoping joint 24, shaft 52, knuckle joint 53, shaft 51 and gears 50,

49 and 48; the'shaft 9 through shaft 21, telescoping joint, knuckle joint 69 shaft 67 and gears 66, 65 and 64 ;'and the shaft 10 through shaft 22, telescoping joint 24, knuckle joint 33, shaft 32 and gears 81, 30 and 29; and

that through the several clutchesand gears isno necessity for a third operation to control one of the several shafts 8,9, 10.-

There are several devices for modifying, the action of the shaft 25 on the shafts 8, 9 and 10 as will be made apparent hereinafter; but the operation and direction of said latter shafts is controlled through the above men- 1 tioned clutches and gears.

In order to control the operation and direction of the several shafts 8, 9, 10, the several clutches, except clutch 34:, are preferably operated from a common source, in such a manner thatonly one of the shafts will be operated at a time and so that all the opera tions must take place in the sequence necessary to obtain proper operation of the several fabric-afiecting devices. The several clutches areop'erated preferably froma common cam, which is itself moved interm1ttently,'but not "necessarily in definite time periods. It is operated, rather, accordlng to the VlIlOllS' periods which may be required for the individual operations of'the several fabric devices, which may vary for difi'erentoperations of the machine.

. Upon'a shaft 78, mounted in bearings upon the bed 6 and arranged at right angles to the shaftg 25, there is fixed a cam? 9 having-a cam surface which, around the greater part of its circumference, is concentric with the shaft,

and which is provided with a recessed or de- ;pressed, portion80. The levers for controlling the several clutches are clustered around and are operated by this cam.

A plate 81 serves as a support for the several levers. A lever 82' is fulcrumed to the plate at 83; and it has one arm 84L provided with a roller 85 which travels in contact with theperiphery of the cam 7 9, while the other arm 86 is fulcrumed to the link 62 through which the clutch 59 is controlled. Whenever the lever 82 is rocked, through the action of the cam 79 or the spring 55, the clutch 59 is either thrown in or out. Whenever the roller85 is on the higher portion of the cam the clutch will be held out; and when the lower portion of the cam is opposite the roller 85, the clutch 59 will be thrown in by the action of the spring 55. In this way the clutch is thrown in by spring action and thrown out by the positive action of the cam.

In addition to throwing the clutch in, the

spring 55 also causes the roller 85 to follow the cam. Whenever the clutch 59 is thrown in, the shafts 20 and 8, will be revolved in that direction which is necessary to loosen the side-tension device.

is thrown inby the action of its spring 71;

device only controls the shifting of the fabric in one direction, and therefore there but at another times the cam holds the clutch out. Whenever this clutch isin, the shafts 21jand 9, will be revolvedin that direction which is necessary to loosen or disengage the vertical trumg and tension ng' devices, preparatory to the'fabric shiftingoperation.

Next infits order of the operation by the cam 79 is the lever 91. This is fulcrumed at 92; and it is fulcrumed to the link 43 through which the clutch 41 is controlled.

The lever carries a roller 93 which contacts is no lever: operated by the cam '7 9 for controlling the clutch 34:. As this clutch governs the backward shifting of the fabric, it is controlled-by the operator, through a manuallyoperated member, as will be here-' inafter explained. It is sufii'cient for'the automatic mechanismto control the starting of thefab'ric-shifting operation in one direction, and its stopping.

The next lever controlled by the cam 79 is numbered 94:. This is fulcrume'd at 95 and has an arm 98 fulcrumed to the'link 72, through which the-clutch 70 is controlled. The other arm of this lever 94 has a roller 97 engagin the cam. Whenever the low portion of the'cam is opposite this roller the spring 71 will throw the clutch in; and this will cause the operation of the shafts 21 and --9, in that direction which is necessary to move the vertical truing and tensioning del vices into engagement with the fabric rollers and to place the vertical tension upon the fabric, if these two operations are performed simultaneously.

'There is another clutch operating lever operated from the cam 7 9. This lever 99 is fulcrumed at 100; and it is fulcrumed to the link 57 which controls the clutch 54cl This lever has a roller 101 contacting with the cam 79. When the low portion of the cam is opposite this roller the spring 60 throws in the clutch 5 1; but at all other times this clutch is held out by the cam. When this clutch is thrown in, the shafts 20 and 8, will be revolved in that direction 'which is necessary to throw the side tension devices into engagement with the fabric and to been completed. This lever 102 is fulcrumed at 103; and it has one arm provided with a nected to the movable portion 106 of a; knife switch 107 bymeans of. which the moheld closed. That is to say, the'cam 79 will hold the switches closed while it is making one complete revolution until the-depressed f'portion comes under the roller104 and then the spring 110-will throw out" the switches o break thecircuits by throwing up the A leverarm 108. This lever may bethrown down however, by the operator, whenever the mechanism is to be started. For this purpose there is a hand lever 111 fulcrumed to the shaft 103; and it is arranged to engage a lateral extension 112 of the arm'108,

for the purpose of rocking the switch oper-;

ating levers whenever the hand lever is moved upwardly. at its freeend r 4 WVhenever the hand lever. is thus operated it causes the closing of the electric circuits, j

which instantly starts the motor; and thus the operation of the machine is'initiated.

As soon as the motor starts, the lever 102 and its connections will be held'by the cam 79 in the position brought about by thehand lever 111, until a complete revolution of the shaft 7 8 has been made when, (the hand lever 111 having been again depressed) the spring 110 will rock the lever 102 to break the circuits and stop themachine.

As was previously stated, the cam 79 is operated intermittently; and I prefer to take the operating force for this from the shaft 25. To that end I have shown a crank arm 113 on one end of the shaft 25; which operates through a pitman rod 114 and crank arm 115 torock the hub 116 which is loose on the shaft 117. In this way the hub 116 is oscillated as the clutch shaft 25 re Volves.

The hub 116, in addition to the crank arm, A

has an arm 118 (shown in Figs. 14 and 15) provided with a top which has two shoulders 119, 120. There is a second hub 121 on the shaft 117, which is independent of the has a forwardly projecting member 126,having a cam surface 127, which acts upon a pin 128 to tilt a shaft 129. The forward end of the pawl 123 also rests on the pin 128 sothat the latter determines when the pawl shall engage" the rocking arm 118. Upon the other end of the shaft 129 there is carried a trippingmember 130 which is held up by means of a trigger 131 that rocks on a pivot 132 (see Fig. 14). The hubv of the trigger 131 carries an armature 133, in line with the cores of the magnets 134, which are included in the controlling circuit.

The tripping of j the trigger 131 by the magnets will release the arm 13Q and allow the latterto fall into the position shown in v Fig. 19. The falling of the arm will rock the shaft 129; and the'arm which .carries'the pin 128 will likewise fall, allowing the pawl 123,to come into the path of the arm 118.

'This latter ,is continuously being rocked by the crank connections 113, 114, 115. If the pawl block 124 comes down while the arm 118 is in the-left position (viewing it as in Fig. 15) then the shoulder 119 will engage the pawl block in its movement to theright.

7 moved to the left.

If the pawl falls while the arm 118 is in its rightwhand position, then the shoulder 120 will engage the pawl block on the movement of the arm 118 to the left. The pawl will therefore engage the arm 118 in whichever direction the latter is moving; and, therefore, the engagement will be almost instantaneous. g

In one case the arm 122 will be moved to the right; and in the other case it will be There is a roller on the upper end of the arm 122, which engages with a cam 136rocking loosely on the shaft 78. This cam has a surface so shaped that the cam will be rocked by the roller 135 in whichever direction the arm 122 is rocked. The purpose of these connections is to'per mit the pawl 123 to engage the arm 118 as soon as it falls, and to cause the rocking of the cam 136 immediately.

After the rocking of the shaft 129 and the dropping of the pawl 123 into engage ment with the arm 118, the latter and the pawl move together, either to the right or the left. Near the end of this movement the cam surface of the arm .126 acts on the pin 128 to rock the shaft 129 and raise the arm 130 again into engagement with the trigger 131. Upon the return movement of the arm 122 one or the other of the surfaces 123 ,of the pawl will engage the pin 128 and cause the pawl to rise until the block 124 is disengaged from the arm 118.

The arm 122 has pin 122 travelingin a slot 118 of the arm 118. After the arm 122 has been moved to the right or left through the engagement of the pawl 123 with one or the other of the shoulders 119, 120 of the arm 118, theshoulder at one or the other end of the slot 118 acts upon the pin 122 to return the arm 122 back to the intermediate position shown in Fig. 15.

Integral with the cam'body 136 there is an arm 137 which carries a pawl .138; the arm being pulled down, to hold the cam 136 in the position shown in Fig. 15, by a spring 139.

On theshaft 78 which carries the cam 79, there is fixed a ratchet disk 140, shown in detail in Fig. 17. This disk is shown provided with six teeth, 141, corresponding with the number of different positions to be given to the cam 79. The pawl 138 engages these teeth so that at every oscillation of the arm 137 the disk 140 and its shaft 7 8, as well as the cam 79, will be advanced one step or position, six of which are included in a com plete revolution thereof.

i The disk 140 carries a piece of insulation 14-2 to which is attached a contact piece 143.

This contacts with pins 144, 145, 146,147,

the actionof the operating mechanism upon the side tenslon and vertical tension devices is modified or terminated.

In Figs. 2, 13, 29, 32 and 34 parts of the side tension device. These parts are all operated from the shaft 8.

As previously stated, the power for operating the shaft 8 is transmitted from gear 50 and shaft 51, through shaft 52, knuckle joint 53, telescoping joint 24 and shaft 20. As will be seen from Figs. 21 and 22, the shaft 51 is journaled in standards 155, 15G mounted upon the base 6; and between these standards the shaft has a screw thread 51. There is a threaded block 157 through which the threaded portion of the shaft 51 passes; and this block, by reason of the threaded connection, is caused to travel in a direction lengthwise of the shaft. To prevent the block from turning with the shaft so that it will be moved along by the latter, there is shown a rod 158 secured to the standards and passing loosely through a groove in the block. The block is free to move along this rod but is prevented by it from turning with the shaft.

There is a rod 159 mounted in the stand ards to have a slight longitudinal movement therein. Near one end, of this rod there is make successive con- 144- 149 which are shown 

